CN205506934U - Impact load electric energy measurement system - Google Patents
Impact load electric energy measurement system Download PDFInfo
- Publication number
- CN205506934U CN205506934U CN201620290395.8U CN201620290395U CN205506934U CN 205506934 U CN205506934 U CN 205506934U CN 201620290395 U CN201620290395 U CN 201620290395U CN 205506934 U CN205506934 U CN 205506934U
- Authority
- CN
- China
- Prior art keywords
- dsp chip
- impact load
- electric energy
- microprocessor
- data management
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses an impact load electric energy measurement system, including the DSP chip, the DSP chip is 24 DSP chips of high accuracy, the DSP chip is connected with adc and data management display, adc is connected with three phase current sensor and three -phase voltage sensor, the DSP chip includes synchronous serial peripheral interface, microprocessor and general asynchronous receiving and dispatching transmission interface, synchronous serial peripheral interface is connected with adc and microprocessor respectively, microprocessor and general asynchronous receiving and dispatching transmission interface are connected, general asynchronous receiving and dispatching transmission interface is connected with the data management display. The utility model discloses a demand of adaptation impact load measurement adopt 24 DSP chips of high accuracy, improved the electric energy accuracy of measuring under impact load adjusts greatly, the setting of data management display has also been strengthened the data management ability greatly and has been made things convenient for user's obtaining data greatly.
Description
Technical field
This utility model relates to a kind of electric energy metered system, particularly a kind of impact load electric energy metered system.
Background technology
Along with industrial production technology is fast-developing, from traditional steel mill, Foundry Works, electrolytic aluminium factory, to emerging subway, motor-car, electric railway, increasing impact load is linked in electrical network, not only make various pollutions in network system increasingly severe, the quality of power supply declines the most increasingly, and these loads have serious power rush, harmonic wave, three-phase imbalance, the complex characteristics such as electric current and voltage drastic change, the quality of power supply in power system can be constituted a serious threat so that conventional metered dose algorithm is difficult under the conditions of impact load accurately measure.
Utility model content
For solving the problems referred to above, the purpose of this utility model is to provide a kind of impact load electric energy metered system.
The invention for solving the technical problem be the technical scheme is that a kind of impact load electric energy metered system, including dsp chip, described dsp chip is high accuracy 24 bit DSP chips, described dsp chip connects analog-digital converter and data management display, and described analog-digital converter connects three-phase current sensor and three-phase voltage sensor;Described dsp chip includes synchronous serial Peripheral Interface, microprocessor and universal asynchronous receiving-transmitting coffret, described synchronous serial Peripheral Interface is connected with analog-digital converter and microprocessor respectively, described microprocessor is connected with universal asynchronous receiving-transmitting coffret, and described universal asynchronous receiving-transmitting coffret is connected with data management display.
Synchronous serial Peripheral Interface of the present utility model has been responsible for the data receiver to analog-digital converter, and after the data adopting single-point three-phase voltage or single-point three-phase current, sampled result is sent to dsp chip by analog-digital converter immediately by synchronous serial Peripheral Interface；Universal asynchronous receiving-transmitting coffret of the present utility model is responsible for receiving the control instruction of data management display and sending the result of calculation of impact load to data management display.
Further, described dsp chip includes that output pulses output interface, described output pulses output interface are connected with microprocessor.
Further, described dsp chip connects has for depositing accounting procedure and the outer extension memory of calibration parameter.Outer extension memory of the present utility model is the Primary memory that dsp chip extends out, and on the one hand it provide the program space depositing program code, on the other hand provides the data space depositing correction parameter.After this utility model electrification reset, the code that starts in dsp chip can complete from outer extension memory reading program and enter the bootup process of application program, and needs to read all correction parameters after starting, and completes the calibration to meter accuracy.Being provided with in outer extension memory and drive module accordingly, the reading of all these outer extension memories is provided driving to support with write operation by described driving module, makes dsp chip smoothly complete the read-write operation to outer extension memory.
Further, described analog-digital converter is 24 high-precision adcs.This utility model employs the high-precision adc of 24, and signal sampling precision guarantee width in the range of has been effectively ensured.
The beneficial effects of the utility model are: this utility model uses high-precision 24 bit DSP chips for the demand adapting to impact load metering, substantially increasing the electric energy metrical accuracy under impact load regulates, the setting of data management display has also been greatly reinforced data managing capacity and has greatly facilitated user's acquisition to data.
Accompanying drawing explanation
The utility model is described in further detail with example below in conjunction with the accompanying drawings.
Fig. 1 is structured flowchart of the present utility model.
Detailed description of the invention
Fig. 1 is structured flowchart of the present utility model, as shown in Figure 1, a kind of impact load electric energy metered system of the present utility model, including dsp chip 1, described dsp chip 1 is high accuracy 24 bit DSP chips, described dsp chip 1 connects analog-digital converter 2 and data management display 3, and described analog-digital converter 2 connects three-phase current sensor 4 and three-phase voltage sensor 5;Dsp chip 1 of the present utility model includes synchronous serial Peripheral Interface 11, microprocessor 12 and universal asynchronous receiving-transmitting coffret 13, described synchronous serial Peripheral Interface 11 is connected with analog-digital converter 2 and microprocessor 12 respectively, described microprocessor 12 is connected with universal asynchronous receiving-transmitting coffret 13, and described universal asynchronous receiving-transmitting coffret 13 is connected with data management display 3.
Synchronous serial Peripheral Interface 11 of the present utility model has been responsible for the data receiver to analog-digital converter 2, after the data adopting single-point three-phase voltage or single-point three-phase current, sampled result is sent to dsp chip 1 by 24 high-precision adcs immediately by synchronous serial Peripheral Interface 11；Universal asynchronous receiving-transmitting coffret 13 of the present utility model is responsible for receiving the control instruction of data management display 3 and sending the result of calculation of impact load to data management display 3.
Specifically, microprocessor 12 of the present utility model has the functions such as data prediction, electric energy metrical, zero passage detection, interpolation, frequency analysis and non-linear angular difference correction.
Owing to sampled data is affected by the dispersibility of components and parts drift characteristic, sensing network time shift characteristic and amplifying circuit gain, certain distance is had with real network wave, need to be modified the accuracy of guarantee metering, therefore use data prediction that sampled data carries out zero correction and angular difference correction, then revised data are transferred to overall situation buffering, and preparation carries out subsequent arithmetic.
Electric energy metrical refers to the calculating of electric flux crucial to forward and reverse active energy, four-quadrant reactive energy etc., for the dynamic characteristic of impact load, this utility model uses 24 high-precision adcs to ensure that quickly catching and accurate analog digital conversion interior on a large scale dynamic waveform to improve sample rate.
Owing to the waveform of impact load often contains the harmonic wave of complexity, m-Acetyl chlorophosphonazo component, the true zero point of waveform is difficult to because there is interference components differentiate, and therefore uses zero passage detection that electrical network is carried out real-time frequency monitoring, completes to block whole cycle data.
Owing to mains frequency is change at random, but the sample rate of metering system is designed as definite value, a kind of non-synchronous sampling of the sampling that therefore hardware system completes, and this utility model uses software interpolation method to realize synchronized sampling.
Frequency analysis refers to analyze the harmonic content of voltage, current waveform in real time, and provides first-harmonic energy and harmonic energy reference data.The power quality problem that impact load causes is the problem all paid close attention to for electricity consumption both sides, possesses one of the feature that simple power quality analysis function is also impact load electric energy metrical software.For the characteristic that impact load change is frequent, random, each cycle all carries out a discrete fourier transform computing, it is ensured that the real-time of frequency analysis.
Owing to the phase-frequency characteristic of current sensing network has nonlinear characteristic, cause the phase shift of different order harmonic components in waveform non-linear, use Linear phase-shift compensation that harmonic energy can be caused to measure misalignment, therefore use non-linear angular difference correction that the phase-frequency characteristic of current sensing network and the phase place of each harmonic component are carried out accurate angular difference correction, to improve the precision of harmonic energy metering.
Preferably, dsp chip 1 of the present utility model connects the outer extension memory 6 for depositing accounting procedure and calibration parameter.Outer extension memory 6 of the present utility model is the Primary memory that dsp chip 1 extends out, and on the one hand it provide the program space depositing program code, on the other hand provides the data space depositing correction parameter.After this utility model electrification reset, the code that starts in dsp chip 1 can complete from outer extension memory 6 reading program and enter the bootup process of application program, and needs to read all correction parameters after starting, and completes the calibration to meter accuracy.Being provided with in outer extension memory 6 and drive module accordingly, the reading of all these outer extension memories 6 is provided driving to support with write operation by described driving module, makes dsp chip 1 smoothly complete the read-write operation to outer extension memory 6.
Preferably, dsp chip 1 of the present utility model includes that output pulses output interface 14, described output pulses output interface 14 are connected with microprocessor 12；Analog-digital converter 2 of the present utility model is 24 high-precision adcs.This utility model employs the high-precision adc 2 of 24, and signal sampling precision guarantee width in the range of has been effectively ensured.
The above, preferred embodiment the most of the present utility model, this utility model is not limited to above-mentioned embodiment, as long as it reaches technique effect of the present utility model with identical means, all should belong to protection domain of the present utility model.
Claims (4)
1. an impact load electric energy metered system, it is characterized in that: include dsp chip (1), described dsp chip (1) is high accuracy 24 bit DSP chips, described dsp chip (1) connects analog-digital converter (2) and data management display (3), and described analog-digital converter (2) connects three-phase current sensor (4) and three-phase voltage sensor (5);Described dsp chip (1) includes synchronous serial Peripheral Interface (11), microprocessor (12) and universal asynchronous receiving-transmitting coffret (13), described synchronous serial Peripheral Interface (11) is connected with analog-digital converter (2) and microprocessor (12) respectively, described microprocessor (12) is connected with universal asynchronous receiving-transmitting coffret (13), and described universal asynchronous receiving-transmitting coffret (13) is connected with data management display (3).
A kind of impact load electric energy metered system the most according to claim 1, it is characterised in that: described dsp chip (1) includes that output pulses output interface (14), described output pulses output interface (14) are connected with microprocessor (12).
A kind of impact load electric energy metered system the most according to claim 1, it is characterised in that: described dsp chip (1) connects the outer extension memory (6) for depositing accounting procedure and calibration parameter.
A kind of impact load electric energy metered system the most according to claim 1, it is characterised in that: described analog-digital converter (2) is 24 high-precision adcs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620290395.8U CN205506934U (en) | 2016-04-08 | 2016-04-08 | Impact load electric energy measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620290395.8U CN205506934U (en) | 2016-04-08 | 2016-04-08 | Impact load electric energy measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205506934U true CN205506934U (en) | 2016-08-24 |
Family
ID=56737249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620290395.8U Active CN205506934U (en) | 2016-04-08 | 2016-04-08 | Impact load electric energy measurement system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205506934U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037390A (en) * | 2017-02-10 | 2017-08-11 | 国网浙江台州市黄岩区供电公司 | Impact load is to electric energy metering error remote monitoring of customer end |
-
2016
- 2016-04-08 CN CN201620290395.8U patent/CN205506934U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037390A (en) * | 2017-02-10 | 2017-08-11 | 国网浙江台州市黄岩区供电公司 | Impact load is to electric energy metering error remote monitoring of customer end |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102539892B (en) | Method for obtaining true effective values of AC (alternating current) signals | |
| CN101382588B (en) | Three phase harmonic standard electric energy meter | |
| CN109709390A (en) | A kind of three-phase high-precision harmonic electric energy meter | |
| CN104330623B (en) | Sine wave parameter measuring method and system in electric power system | |
| CN104155517B (en) | A kind of non-integer-period sampled error compensating method of digitalized electrical energy meter and system | |
| CN114035142A (en) | Electric energy meter error compensation method and system based on segmented Lagrange interpolation | |
| CN102902879A (en) | Synchronous phasor calculation method based on discrete Fourier transform (DFT) recursion of field programmable gate array (FPGA) hardware | |
| CN102221639A (en) | Positive and negative sequence current real-time detection method | |
| CN107271770A (en) | Digital measuring method for measuring frequency in power circuit | |
| JP5000441B2 (en) | Power measuring method and power measuring apparatus | |
| CN103983849A (en) | Real-time high-accuracy power harmonic analysis method | |
| CN205506934U (en) | Impact load electric energy measurement system | |
| CN204116594U (en) | Based on the electric energy meter remote calibration device of satellite navigation system | |
| CN113702897A (en) | Anti-harmonic interference three-phase electric energy meter on-site calibration instrument | |
| CN210982602U (en) | High-accuracy three-phase standard electric energy meter with harmonic measurement function | |
| CN204679550U (en) | Electric energy accurate measuring device under a kind of fluctuating load | |
| CN102721861A (en) | Alternating current power measurement method | |
| CN104135284B (en) | Phase discrimination method and device as well as phase locking method and phase-locked loop | |
| CN205229295U (en) | A device for photovoltaic power generation electric energy measurement monitoring | |
| CN201255768Y (en) | Three phase harmonic standard electrical energy meter | |
| CN103499742A (en) | Method for reducing influence on high-precision phase measurement due to signal amplitude change | |
| CN205193159U (en) | Dry -type air -core reactor loss detection device | |
| Liu et al. | A Metering Device for DC Energy Meters | |
| CN110927452B (en) | Phase difference measuring method and device based on instantaneous reactive power | |
| CN204166121U (en) | Based on the electric energy meter field calibration system of satellite navigation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |